Low oil pressure?

I’m going to throw this way out there -

How’s the alternator, regulator, and battery? Full system voltage? I’ve had a mopar or two where the idle was so poor or the system voltage too low - enough to change indication.

You have one of these traits - it happens at idle.

I’ve also had a wiring problem to the pressure sending unit where the unit connector was simply loose on that little nail head they give you to wire it up. Thinking back, it had a pretty consistent on/off cycle to it. It was a nice RamCharger, too. 318 >100k so if it wasn’t ticking, it had oil pressure.

Something else to check.